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UB4B0

All-constellation GNSS High Precision Board

All-constellation, multi-frequency GNSS high-precision board based on Nebulas II SoC. It features a 20Hz RTK data update rate. With its excellent performance, UB4B0 is well-suited for CORS, surveying, and mapping, among other applications.

APPLICATIONS

CORS Reference Station

Surveying and Mapping

Features

Based on Nebulas-II high-performance SoC, with 432 channels
Supports GPS, BDS, GLONASS, Galileo and QZSS, including Beidou-3 signal
Supports any single system standalone positioning and multi-system joint positioning
Multi-path suppression technology and low elevation angle tracking technology, adaptive anti-narrowband interference of up to 60 dB
Centimeter level high precision RTK positioning, better than 1 mm carrier phase observation
Supports serial port, Ethernet port, 1PPS, external clock input
Compatible with mainstream GNSS boards

Technical Specifications

Performance Specifications

Channel	432 channels, based on NebulasII chip
Frequency	BDS B1I/B2I/B3I/B1C/B2a/B2b
	GPS L1/L2C/L2P(Y)/L5
	GPS L1/L2C/L2P(Y)/L5
	Galileo E1/E5a/E5b
	QZSS L1/L2/L5
Single Point Positioning (RMS)	Horizontal: 1.5 m
	Vertical: 2.5 m
DGPS (RMS)	Horizontal: 0.4m
	Vertical: 0.8 m
RTK (RMS)	Horizontal: 0.8 cm + 1 ppm
	Vertical: 1.5 cm + 1 ppm
Cold Start	< 40 s
Reacquisition	< 1 s
Initialization Time	< 5 s (Typical)
Initialization Reliability	> 99.9%
Observation Update Rate	20 Hz*
Observation Accuracy (RMS)	BDS	GPS	GLONASS	Galileo
B1/B1C/L1 C/A/G1/E1 Code	10 cm	10 cm	10 cm	10 cm
B1/L1 C/A/G1/E1 Carrier Phase	1 mm	1 mm	1 mm	1 mm
B2/L2P(Y)/L2C/G2/E5b Code	10 cm	10 cm	10 cm	10 cm
B2/L2P(Y)/L2C/G2/E5b Code	1 mm	1 mm	1 mm	1 mm
B3/B2a/L5/E5a Code	10 cm	10 cm	10 cm	10 cm
B3/B2a/L5/E5a Carrier Phase	1 mm	1 mm	1 mm	1 mm
Time Accuracy (RMS)	20 ns
Velocity Accuracy (RMS)	0.03 m/s
Positioning Update Rate	20 Hz*
Correction	RTCM V3.0/3.2
Data Format	NMEA 0183, Unicore*

Electrical Specifications

LNA	4.75~5.10V, 0~100 mA
RTC	3.0-3.3V DC
Ripple Voltage	100 mVpp
Power Consumption	2.8 W(Typical)

Physical Specifications

Dimensions	100 x 60 x 11.4 mm
Weight	45g
IO Connectors	2 x 12 pin
IO Connectors	2 x 8 pin
Antenna Input	MMCX
External Oscillator	MMCX

Functional Ports

1 x UART (RS-232)

2 x UART(LV-TTL)

1 x LAN, 10 / 100 M

2 x 1PPS (LVTTL)

1 x Event

Environmental Specifications

Operating Temperature	-40 °C ~ +85 °C
Storage Temperature	-55 °C ~ +95 °C
Humidity	95% Non-condensing
Vibration	MIL-STD-810
Shock	MIL-STD-810

Download

UB4B0_User_Manual_EN_R2.6

25/12/2023

VIEW